An interesting idea done well. Can't imagine why there were all the sequels.
Leonard Maltin/Plot synopsis:
Intriguing, near-classic sci-fi. Heston leads a group of surviving astronauts in shocking future world where apes are masters, humans slaves. Only liabilities: somewhat familiar plot, self-conscious humor; otherwise, a must-see. Michael Wilson and Rod Serling scripted from Pierre Boulle's novel, spawning four sequels and two TV series. Won a special Oscar for make-up created by John Chambers. Panavision.